Primitive or anti-derivative of a function: A function ø is called a primitive or an ant derivative of a function f(x) if ø’(x) = f(x). Let ø (x) be a primitive of a function f(x) and let C be any constant then, d/dx [ø (x) + C] = ø’ (x) = f (x) [∵ø’ (x) Read more about Integral as Anti Derivative[…]
Puzzle 1: Distances from you to certain cities are written below. BERLIN 200 miles PARIS 300 miles ROME 400 miles AMSTERDAM 300 miles CARDIFF??? Miles How far should it be to Cardiff? Solution: 100 miles. Each vowel is worth 300 and each consonant is worth -100. These are totaled in each city name to give Read more about Puzzle 5 [With Answers][…]
RMS Value: RMS value is defined on the basis of the heating effect of the waveform. The ac voltage at which heat produced in an ac circuit is equal to heat produced in the dc circuit is called as Vrms, provided both ac circuit ac circuit and dc circuit have equal value of resistance and Read more about RMS Value & Average Value[…]
Puzzle 1: Distances from you to certain cities are written below. BERLIN 200 miles PARIS 300 miles ROME 400 miles AMSTERDAM 300 miles CARDIFF??? Miles How far should it be to Cardiff? Puzzle 2: If you throw me from the window, I will leave a grieving wife. Bring me back, but in the door, and Read more about Puzzle 5[…]
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Teaser 1: I am married woman, john’s son is my daughter’s father. What is my relationship to john? Answer: Daughter – in – law Explanation: Her daughter’s father is her husband. This means john’s son is her husband, so john is her father – in – law, making her the daughter – in – law. Read more about Brain Teaser 12 [With Answers][…]
Lanthanides: Lanthanides consist of elements that follow lanthanum and involve the filling of 4f subshell. Electronic Configuration: [Xe] 4fn+1 5d° 6s2 or [Xe] 4fn 5d1 6s2 The general valence shell electronic configuration of lanthanides is 4f1−146s2. Atomic and Ionic Sizes of Lanthanides: Atomic and ionic radii of lanthanides decrease with an increase in atomic number. This gradual decrease is known as lanthanides contraction. Because Read more about Inner Transition Elements (f – block) – Lanthanoids[…]
Teaser 1: I am married woman, john’s son is my daughter’s father. What is my relationship to john? Teaser 2: How do you get 24 from 9, 6, 11 and 3, using addition, subtraction, multiplication or division? Teaser 3: A milkman has 2 empty jugs: a 3 gallon jug and a 5 gallon jug. How Read more about Brain Teaser 12[…]
Sometimes we are interested to replace a relatively complicated resistor combinations with a single equivalent resistor, especially when we are not interested in the current, Voltage or power associated with any of the individual resistors in the combinations. All the current, voltage and power relationships in the remainder of the circuit will be unchanged. Consider Read more about Resistors in Series and Parallel[…]
Puzzle 1: A man was outside taking a walk, when it started to rain. The man didn’t have an umbrella and he wasn’t wearing a hat. His clothes got soaked, yet not a single hair on his head got wet. How could this happen? Answer: The man was bald. Puzzle 2: A cowboy rides into Read more about Puzzle 4 [With Answers][…]